Mechanical movement.



C. J. ROBERTSON.

MECHANICAL MOVEMENT.

` APPLICATION FILED JULY 11, 1905. EENBWBD 11,110.5, 1911.

1,033,941.. Patented July 3o, 191.2.

3 SHEETS-SHEET 2.

C. J. ROBERTSON.

MECHANICAL MOVEMENT.

APPLIOATION FILED JULY 11I 1905. RENEWBD DBO. 5, 1911.

SHEET 3.

3 SHEETS- Patented July 30, 1912.

wenn?, i4 minimum or sevrage; vestimentas. assists.' sa 'isf- MECHANICAL' ignvnggiw. I

Serenatas f wm #met Bateman ,nur an., m12.

Application illed July 1.1, 1995, Serial No. 269353613.. B enewd I'D'egemper 5,I 11911. erial No. 664,082.'

Zg all lwhom t wilaycqncem:

Be it irown that I, CHARLES J.. ROBERT- soN,`a subject ofthe 'Kingoflhigland2 residing at Tauntonin `the"coi`nty"6f Bristol and State of-Massachusetts, have invented a new and useful Mechanical Movement, of which the followin is a s eci'atienl'- The object' of this inve tion is to 'provide a new and improved'mechanical mdvement 'lor converting' rotary `motion into reciprocatin motion.

""Th. invention has been particularly'de- Si ned ai '0 printingv ma 'I he especial piirlxise of the invention is:

to 'provi e a mechani'al movement'of class'withffewparts, and tp' provide a movement which is articularlt adapted to work 'correctlxy'on ey so-calle lan thati's, loin' the'p'llai wherein a :nain (yi-"constant speed 'mec'anism is *combined with a reversing mechanism, so that each works`alternately for `ha f'revolntion, or

man the "time of e@ @is at Speed. mvef'ent is eqlal te the time Q #eeh reversing movement.'

The' mechanism is shown in the accompanyingthree'sheets of drawings.h ,o

eferring to t e drawings and 1n detail, Eigure' is a ai'tialside elevation of enough f the mechanisni'to illustratev my invention 2'i's"'a sect-ioiial'plan view' on an enlarged scale the section'heing taken on the une 2 2 ofzrig; 1. "Ei ist secionalend d elevation relatively to 1`, the main shaft having be'eng'ven a quarter tiir'n' forward relatively" to the position'fthe parts shown in'Fig 1'. Figs. LLto 6 inclusive are detail vviewsfof one ofthe vvristpilis, 7 isa development Aof one of t e cain ooves hereinafter ieferred' to. AFlg. 8 isn a sectional view' taken'on'the line '8l-8 of Fig. 7. "Fig 9 is' a central fsection taken on Eig. 7. Fig. 10.' is a section taken on' the line 1041() f Fig. 7. Fig. 11 is a View similar to Fig. 7 illustratingthe projection of t e other lcam 'ovesl Figs. 12 te 14 are diagrammatic vlews illustratingone reversn action, and Figs. 15 to 17 inclusive, are iagrammatic views illustrating the other-` reversingactiqn.

Referring to the drawings and in detail, A designates the `reciprocat1ngbed or member, and ZB the iin ression' cylinder' of an ordinary tworevi on'inipressiocylinder i th,.....s.haft ,of 510W .f3

' wilg 'Wit twrevelution thebashing1,7;

a be. aber# @eProp-amg 'mala to-andgEro under the impression cylmdei'l'J y Aranged as common, the hed being mounted th'ewshaft 10";1'11' iiileshes with' the gear" 12 I i I t eimpressiqn cylinder. er' may be applied tfthe gear ll'bya n 13. gearf`14 alsd'ared ori-the shaft 10, and this gear' rieshes a pinion`15` arranged n a sh'ft '16', which shaft"is joiirnaled 'eccentrica 1jr 'in driving ypinio hashing' 17 "fitted in the framing.` A'driv` in pinion 18 is arranged lon"the innerend shaft 16. Two `facingracks19 and '2D arearrangei on a raklhan'ger 'Engaging'the groove of this ycam isa roller 240"se`cur'ed'on an arm 25' depending from This mehanism constitutes smindpiving meehqnism arm ed that the' ariying pinion 'is 'will alternate y" mesh @nach qf-'fh' driving mais 19 and 2o tb give the constant or mainuspeed' movement thereto.. I.

' If the pinions 15. and 1 are made of the same size, which ispreferred, the'gear 1li represents the opfpirativetimingV element of the machine-that is vv,said gear' 14`will'1`iiake two revolutions forl each complete reciproeqtipn ofthe'bed.' t

f Secured `on the inner end of the main shaft shaft 1'0 isl a revolving cnkldisk or crankelement 26,.H This 'crank-.disk carries tw'wrist'pins 27 and 28 y'which are fitted so as to be capablle o'f'axial movement the crank disk, lor`1n the crank element. The detail of ene crank-pin 27 1s shown in Figs. 2, '4, 5 and 6."`The cra kin is rov'id'ed with a roller 2 9 which'is -e d in ace by a suitable vcollai` f The cranklpln 1s rovi'ded'with'a" dove 31,' engaging whic is a screw`32 tapped into the'crankldisk or crarik-elementl 26 which preventsl 'the crankpin' fr()l I' turning. The, crank-pin carries a. sh'uttle @3 which consists 'of'a` piece' fhar- 'xil 'steel poited' at its) ends :This shuttle iven ' ispivotally held tothe crank-pinA by av stud wardly lrelatively'to 'the center 'of the crankdisk.

35 designates the crank-pin controller or cam. Thls vconsist's'of a disk which is rigidly secured on theinner end of the bearing of the main shaft 10 so as to be stationary. The controller has a circular slot 36 cut therein. Cut in the inner eriphery of the slot 36, that is,4 in the sur ace of the same nearest the axis of the shaft 10, is a double cam roove 37. This double oove 37 forms a pat way twice around the inner periphery of said slot, the development of which pathway is shown in Fig. 7. The outer periphery of said slot 36 is formed wlth a similar double cam groove 38-38, which the shuttle of the wrist-pin 28 engages, the development of this double cam groove being shown in Fig. 1-1.

Fi s. 7 and 11 are drawn to the same lengt for the purposes of explanation. In actual development, Fig. 11, would be slightly longer than Fig. 7, as the length of the outer periphery of the slot 36 1s longer than that of the inner periphery of the slot which, in operation, is compensated for by the fact that the shuttles are placed on op osite sides of the crank-pins 27 and 28. T e double cam grooves previously referred to will act to hold each Wrist-pin out practically for a half revolution of the crank-element, and to draw it into inoperative position for a revolution and a half oi' the crank-element, so that the movement may work as a correct two-revolution movement as hereinafter described. The two double cam grooves 37-37 and 38-38 are set so that one will operate one periphery ahead of the ot-her. Depending from the bed is a frame 39 which has a vertical slot 40 at its frontend which the wrist-pin 27 engages, and a vertical slot 41 at its rear end which the wrist-pin 28 engages.

The operation of the mechanism can be followed from the second and third sheets of drawings. Suppose the bed to be just completing its constant speed return movement to the right, and the main driving mechanism just becoming inoperative as the driver. In this posit-ion the shuttle of the wrist-pin 27 will be at the point marked 12, in Fig. 7 and the wrist-pin 27 will have been thrust.out of the crank-element to engage the bottom of the slot 40 by the shuttle working up the incline of the cam groove. Now during the next quarter turn of the crank element the bed will be brought from full speed gradually to rest at its right-hand extreme, as shown in Fig. 13, by the Wristpin working in said slot 40. Now during 4eased oi as shown in Figs. 1 and 6 at the highest and lowest points, so that the Wristpins can be shot into and withdrawn from the same without cramping. Durin next revolution and a half of the cran -element, the shuttle of the wrist-pin 27 will work in the remaining portion of the cam groove 37-37, crossing to the lowest path at the switch or cross-over at section 10; then running in the lowest part of the groove to the position 17; then going through the cross-over to the intermediate part of the groove until it reaches the position 12, when the l 1t again comes into operation. By this path it will be seen that the Wrist-pin is in operative position only for a half turn of the crank element. Returning now to position Fig. 14, it will be seen that during the next half turn of the crank element, the main drivin mechanism will become operative as the drlver, and will give the lbed its constant speed forward movement to the left. This will bring the parts to the position shown in Fig. 15. When the parts come to this position, the shuttle on the wrist-pin 28 will be at position marked 15 in Fig. 11, and thereby will shoot the wrist-pin 28 into the rear reversing slot 41. Now during the next quarter revolution of the crankelement the main driving mechanism will become inoperative as the driver, and the crank-pin 28 Working in the slot 41 will retard the bed from full speed movement to a state of rest at its left-hand extreme, bringing the parts to the position shown in Fig. 16. Now during the next quarter revolution of the crank-element, the wrist-pin 28 working in the slot 41 will start the bed from its left-hand extreme on its return stroke at a speed commencing at zero and gradually increasing up to constant speed. This will bring the parts to the position shown in Fig. 17. As the parts reach this position, the shuttle on the wrist-pin 28 will reach the position 17 in the cam groove 38-38, and the next slight movement of the crank-element will draw the wrist-pin from the reversing slot 41. As this action takes place, the main driving mechanism becomes operative as the driver, and the bed is given its constant speed return movement for a half turn of thel crank element, bringing the parts back to the position shown in Fig. 12, from which the cycle of operation was first described. Thus it will be seen that the feature of the engagement of the wrist-pins with the reversing slots by a lateral or axial movement of the wrist-pins in the crank-element to engage and disengage the slots greatly simplifies the mechanism. It thus will be seen that a simple mechanism is provided for impart-ing the described movements.

Having thus fully described my invention, what I claim and desire to secure by Letters Patent is 1. In a mechanical movement, the combination of a reciprocating bed or member, a main driving mechanism for giving the same its constant speed movement, and a reversing mechanism comprising a revolving element, two wrist pins mounted to move axially therein, parts forming a reversing means on the bed, and means for moving the wrist pins in the crank element to engage said reversing means, the parts being varranged to form a two revolution movement.

2. In a mechanical movement, the combination of a reciprocating bed or member, a

main driving mechanism for giving the same its constant speed movement, and a reversing mechanism comprising a revolving element, two wrist pins mounted to move axially therein, parts forming a reversing means on the bed, and means for moving the wrist pins in the crank element to engage and disengage said reversing means, the part-s being combined to form a two revolution movement.

3. In a mechanical movement, the combination of the reciprocating bed or member, a main driving mechanism forgiving the same its constant speed movements, and a reversing mechanism comprising a revolving element, two wrist-pins mounted in said element so as to be capable of movement therein, parts carried by the bed forming reversing slots, and means for moving said Wrist-pins in the crank element to work with said slots.

4. In a mechanical movement, the combination of the reciprocating bed or member, a main driving mechanism for giving the same its constant speed movements, and a reversing mechanism comprising a revolving eiement, wrist-pins mounted to move therein, parts forming reversing slots on the bed, and means for moving the wristpins in the crank element to engage and disengage the reversing slots.

5. In a mechanical movement,.the combi nation of the reciprocating bed or member, a main driving mechanismV for giving the same its constant speed movements, and a reversing mechanism comprising a revolving element, a wrist-pin mounted to slide axially in the element, parts carried by the bed forming a reversing slot, a shuttle carried by the wrist-pin, and a controller having a cam groove which said shuttle engages.

6. In a mechanical movement, the combination of the reciprocating bed or member, a main driving mechanism for giving the same its constant speed movements, and a reversing mechanism comprising a revolving element, two wrist-pins fitted to move axially therein, parts carried by the bed forming reversing slots, shuttles on the wrist-pins, and a controller having two double cam grooves which said shuttles engage to slide the wrist-pins in and out in the crank-element.

7. In a mechanical movement, the combination of a reciprocating bed or member, a main driving mechanism for giving the same its constant speed movements, and a reversing mechanism comprising a revolving element, two Wrist-pins fitted to slide axially therein, means for moving the wristpins, and parts carried by the bed forming reversing slots, said slots being eased oii at the points where the wrist-pins engage and disengage the same.

8. In a mechanical movement, the combination of t-he reciprocating bed or member, a main driving mechanism for giving the same its constant speed movements, and a reversing mechanism comprising a revolving crank element making two revolutions for each cycle of operation, two wrist-pins fitted to slide axially in said crank element, parts forming two reversing slots carried by the bed, and means for moving the wristpins in the crank element to engage said slots.

9. In a mechanical movement, the combination of the reciprocating bed or member, a main driving mechanism for giving the same .its constant speed movements, and a reversing mechanism comprising a revolving crank element making two revolutions for each cycle of operation, two wrist-pins itted to slide axially in said crank element, parts forming two reversing slots carried by the bed, means for moving the wrist-pins in said crank element so that each wrist-pin will work alternately with the main driving mechanism for a half revolution of the crank element.

In testimony whereof I have hereunto set my hand, in the presence of two subscribing witnesses.

p C. J'. ROBERTSON. Witnesses Roria'rsy JOHNSTON, M. J. MoRRsoN. 

